Does the Subscription WIndows build not exist yet? I'm assuming that's the one missing from the original post, but it says OS X subscription twice and never mentions the Windows subscription.

Does OSL texture support in 3.08 mean X-Particles materials will work in Octane?

Also for reference, here is the scene with the Alpha Channel but no fog.
Maybe I am misunderstanding how this works, I am just curious why the fog medium makes the checkerboard alpha material show up in reflections in the Live Viewer?

Here is the scene with the fog medium still on the Octane Daylight with NO Alpha channel:

I've just added a Medium to my Octane Daylight tag and it's working thanks to this post. But it seems like the Medium is now making a reflective surface reflect the alpha checkered background in my Live Viewer? It doesn't render like this, and if I turn off alpha channel the live viewer returns to ...